From 7abd8d58c21f77290590a8c4e0a7d5e145017e18 Mon Sep 17 00:00:00 2001
From: Sebastian Redl <sebastian.redl@getdesigned.at>
Date: Mon, 27 Sep 2010 23:20:01 +0000
Subject: [PATCH] My previous fix was incorrect for non-chained PCH reuse. Fix
 again.

llvm-svn: 114922
---
 clang/lib/Serialization/ASTWriter.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 61ba5ab71ba5..3f537d21ab57 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -1334,7 +1334,7 @@ void ASTWriter::WritePreprocessor(const Preprocessor &PP) {
   // If the preprocessor has a preprocessing record, emit it.
   unsigned NumPreprocessingRecords = 0;
   if (PPRec) {
-    unsigned IndexBase = PPRec->getNumPreallocatedEntities();
+    unsigned IndexBase = Chain ? PPRec->getNumPreallocatedEntities() : 0;
     for (PreprocessingRecord::iterator E = PPRec->begin(Chain),
                                        EEnd = PPRec->end(Chain);
          E != EEnd; ++E) {
-- 
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